While doing some fact checking for a consulting job, I had cause to review Australian Standard AS 2671; Hydraulic Fluid Power-General Requirements for Systems. This Australian Standard is basically the International Standard, ISO 4413 with some amendments based on the local advisory committee’s input.
One of these amendments has to do with pump suction strainers. Section 8.3.3 of ISO 4413:2010, … Read more
One of the advantages of variable-displacement pumps with hydraulic or electro-hydraulic displacement control, or load-sensing control, is their low standby pressure. Meaning, when pump output isn’t required, the pump ‘stands by’ at a relatively low pressure, and usually at zero flow — other than that necessary for the make-up of internal leakage.
From an efficiency (heat-load) perspective, the lower this … Read more
One of our members described the hydraulic layout of a rear-mounted knuckle crane on a truck, which was giving trouble, as follows:
“The pump is a bent axis Muncie pump 20 GPM, 4300 PSI. The pressure line is 3/4″ hose and steel tube. The pump intake line is a 2″ suction hose from the tank located on the crane base … Read more